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1 /* ========================================================================== */ |
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2 /* === UMF_set_stats ======================================================== */ |
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3 /* ========================================================================== */ |
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4 |
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5 /* -------------------------------------------------------------------------- */ |
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6 /* UMFPACK Version 4.4, Copyright (c) 2005 by Timothy A. Davis. CISE Dept, */ |
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7 /* Univ. of Florida. All Rights Reserved. See ../Doc/License for License. */ |
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8 /* web: http://www.cise.ufl.edu/research/sparse/umfpack */ |
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9 /* -------------------------------------------------------------------------- */ |
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10 |
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11 /* |
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12 Sets statistics in Info array. Calculates everything in double precision, |
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13 rather than Int or size_t, so that usage estimates can be computed even if |
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14 the problem is so large that it would cause integer overflow. |
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15 |
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16 This routine has many double relop's, but the NaN case is ignored. |
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17 */ |
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18 |
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19 #include "umf_internal.h" |
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20 #include "umf_symbolic_usage.h" |
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21 |
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22 GLOBAL void UMF_set_stats |
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23 ( |
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24 double Info [ ], |
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25 SymbolicType *Symbolic, |
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26 double max_usage, /* peak size of Numeric->Memory, in Units */ |
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27 double num_mem_size, /* final size of Numeric->Memory, in Units */ |
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28 double flops, /* "true flops" */ |
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29 double lnz, /* nz in L */ |
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30 double unz, /* nz in U */ |
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31 double maxfrsize, /* largest front size */ |
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32 double ulen, /* size of Numeric->Upattern */ |
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33 double npiv, /* number of pivots found */ |
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34 double maxnrows, /* largest #rows in front */ |
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35 double maxncols, /* largest #cols in front */ |
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36 Int scale, /* true if scaling the rows of A */ |
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37 Int prefer_diagonal, /* true if diagonal pivoting (only square A) */ |
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38 Int what /* ESTIMATE or ACTUAL */ |
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39 ) |
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40 { |
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41 |
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42 double sym_size, work_usage, nn, n_row, n_col, n_inner, num_On_size1, |
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43 num_On_size2, num_usage, sym_maxncols, sym_maxnrows, elen, n1 ; |
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44 |
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45 n_col = Symbolic->n_col ; |
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46 n_row = Symbolic->n_row ; |
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47 n1 = Symbolic->n1 ; |
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48 nn = MAX (n_row, n_col) ; |
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49 n_inner = MIN (n_row, n_col) ; |
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50 sym_maxncols = MIN (Symbolic->maxncols + Symbolic->nb, n_col) ; |
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51 sym_maxnrows = MIN (Symbolic->maxnrows + Symbolic->nb, n_row) ; |
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52 elen = (n_col - n1) + (n_row - n1) + MIN (n_col - n1, n_row - n1) + 1 ; |
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53 |
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54 /* final Symbolic object size */ |
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55 sym_size = UMF_symbolic_usage (Symbolic->n_row, Symbolic->n_col, |
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56 Symbolic->nchains, Symbolic->nfr, Symbolic->esize, prefer_diagonal) ; |
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57 |
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58 /* size of O(n) part of Numeric object during factorization, */ |
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59 /* except Numeric->Memory and Numeric->Upattern */ |
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60 num_On_size1 = |
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61 DUNITS (NumericType, 1) /* Numeric structure */ |
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62 + DUNITS (Entry, n_inner+1) /* D */ |
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63 + 4 * DUNITS (Int, n_row+1) /* Rperm, Lpos, Uilen, Uip */ |
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64 + 4 * DUNITS (Int, n_col+1) /* Cperm, Upos, Lilen, Lip */ |
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65 + (scale ? DUNITS (Entry, n_row) : 0) ; /* Rs, row scale factors */ |
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66 |
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67 /* size of O(n) part of Numeric object after factorization, */ |
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68 /* except Numeric->Memory and Numeric->Upattern */ |
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69 num_On_size2 = |
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70 DUNITS (NumericType, 1) /* Numeric structure */ |
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71 + DUNITS (Entry, n_inner+1) /* D */ |
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72 + DUNITS (Int, n_row+1) /* Rperm */ |
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73 + DUNITS (Int, n_col+1) /* Cperm */ |
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74 + 6 * DUNITS (Int, npiv+1) /* Lpos, Uilen, Uip, Upos, Lilen, Lip */ |
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75 + (scale ? DUNITS (Entry, n_row) : 0) ; /* Rs, row scale factors */ |
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76 |
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77 DEBUG1 (("num O(n) size2: %g\n", num_On_size2)) ; |
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78 |
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79 /* peak size of Numeric->Memory, including LU factors, current frontal |
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80 * matrix, elements, and tuple lists. */ |
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81 Info [UMFPACK_VARIABLE_PEAK + what] = max_usage ; |
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82 |
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83 /* final size of Numeric->Memory (LU factors only) */ |
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84 Info [UMFPACK_VARIABLE_FINAL + what] = num_mem_size ; |
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85 |
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86 /* final size of Numeric object, including Numeric->Memory and ->Upattern */ |
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87 Info [UMFPACK_NUMERIC_SIZE + what] = |
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88 num_On_size2 |
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89 + num_mem_size /* final Numeric->Memory size */ |
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90 + DUNITS (Int, ulen+1) ;/* Numeric->Upattern (from Work->Upattern) */ |
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91 |
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92 DEBUG1 (("num mem size: %g\n", num_mem_size)) ; |
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93 DEBUG1 (("ulen units %g\n", DUNITS (Int, ulen))) ; |
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94 DEBUG1 (("numeric size %g\n", Info [UMFPACK_NUMERIC_SIZE + what])) ; |
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95 |
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96 /* largest front size (working array size, or actual size used) */ |
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97 Info [UMFPACK_MAX_FRONT_SIZE + what] = maxfrsize ; |
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98 Info [UMFPACK_MAX_FRONT_NROWS + what] = maxnrows ; |
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99 Info [UMFPACK_MAX_FRONT_NCOLS + what] = maxncols ; |
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100 DEBUGm4 (("maxnrows %g maxncols %g\n", maxnrows, maxncols)) ; |
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101 DEBUGm4 (("maxfrsize %g\n", maxfrsize)) ; |
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102 |
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103 /* UMF_kernel usage, from work_alloc routine in umf_kernel.c */ |
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104 work_usage = |
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105 /* Work-> arrays, except for current frontal matrix which is allocated |
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106 * inside Numeric->Memory. */ |
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107 2 * DUNITS (Entry, sym_maxnrows + 1) /* Wx, Wy */ |
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108 + 2 * DUNITS (Int, n_row+1) /* Frpos, Lpattern */ |
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109 + 2 * DUNITS (Int, n_col+1) /* Fcpos, Upattern */ |
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110 + DUNITS (Int, nn + 1) /* Wp */ |
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111 + DUNITS (Int, MAX (n_col, sym_maxnrows) + 1) /* Wrp */ |
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112 + 2 * DUNITS (Int, sym_maxnrows + 1) /* Frows, Wm */ |
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113 + 3 * DUNITS (Int, sym_maxncols + 1) /* Fcols, Wio, Woi */ |
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114 + DUNITS (Int, MAX (sym_maxnrows, sym_maxncols) + 1) /* Woo */ |
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115 + DUNITS (Int, elen) /* E */ |
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116 + DUNITS (Int, Symbolic->nfr + 1) /* Front_new1strow */ |
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117 + ((n_row == n_col) ? (2 * DUNITS (Int, nn)) : 0) ; /* Diag map,imap */ |
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118 |
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119 /* Peak memory for just UMFPACK_numeric. */ |
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120 num_usage = |
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121 sym_size /* size of Symbolic object */ |
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122 + num_On_size1 /* O(n) part of Numeric object (excl. Upattern) */ |
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123 + work_usage /* Work-> arrays (including Upattern) */ |
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124 + max_usage ; /* peak size of Numeric->Memory */ |
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125 |
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126 /* peak memory usage for both UMFPACK_*symbolic and UMFPACK_numeric. */ |
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127 Info [UMFPACK_PEAK_MEMORY + what] = |
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128 MAX (Symbolic->peak_sym_usage, num_usage) ; |
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129 |
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130 Info [UMFPACK_FLOPS + what] = flops ; |
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131 Info [UMFPACK_LNZ + what] = lnz ; |
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132 Info [UMFPACK_UNZ + what] = unz ; |
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133 } |
